问题
解答题
脱式计算
6.25-40÷16×2.5
1.8×0.2+2.2×25%
2700×(506-499)÷900
33.02-(148.4-90.85)÷2.5
18.1÷(3-0.299+0.23)×1.
答案
(1)6.25-40÷16×2.5,
=6.25-2.5×2.5,
=6.25-6.25,
=0;
(2)1.8×0.2+2.2×25%,
=0.36+0.55,
=0.91;
(3)2700×(506-499)÷900,
=2700×7÷900,
=18900÷900,
=21;
(4)33.02-(148.4-90.85)÷2.5,
=33.02-57.55÷2.5,
=33.02-23.02,
=10;
(5)18.1÷(3-0.299+0.23)×1,
=18.1÷(2.701+0.23)×1,
=18.1÷2.931×1,
=
×1,18100 2931
=
.18100 2931